package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @Author：chén jiā jùn
 * @Create：2023年11月19日23:30
 */
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

	@Autowired
	private ShoppingCartMapper shoppingCartMapper;
	@Autowired
	private DishMapper dishMapper;
	@Autowired
	private SetmealMapper setmealMapper;

	/**
	 * 添加购物车
	 *
	 * @param shoppingCartDTO
	 */
	@Override
	public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
		ShoppingCart shoppingCart = new ShoppingCart();
		BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
		//只能查询自己的购物车数据
		shoppingCart.setUserId(BaseContext.getCurrentId());

		//判断当前商品是否在购物车中
		List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

		if (shoppingCartList != null && shoppingCartList.size() == 1) {
			//如果已经存在，就更新数量，数量加1
			shoppingCart = shoppingCartList.get(0);
			shoppingCart.setNumber(shoppingCart.getNumber() + 1);
			shoppingCartMapper.updateNumberById(shoppingCart);
		} else {
			//如果不存在，插入数据，数量就是1

			//判断当前添加到购物车的是菜品还是套餐
			Long dishId = shoppingCartDTO.getDishId();
			if (dishId != null) {
				//添加到购物车的是菜品
				Dish dish = dishMapper.getById(dishId);
				shoppingCart.setName(dish.getName());
				shoppingCart.setImage(dish.getImage());
				shoppingCart.setAmount(dish.getPrice());
			} else {
				//添加到购物车的是套餐
				Setmeal setmeal = setmealMapper.getById(shoppingCartDTO.getSetmealId());
				shoppingCart.setName(setmeal.getName());
				shoppingCart.setImage(setmeal.getImage());
				shoppingCart.setAmount(setmeal.getPrice());
			}
			shoppingCart.setNumber(1);
			shoppingCart.setCreateTime(LocalDateTime.now());
			shoppingCartMapper.insert(shoppingCart);
		}
	}

	/**
	 * 查看购物车
	 * @return
	 */
	@Override
	public List<ShoppingCart> showShoppingCart() {
		return shoppingCartMapper.list(ShoppingCart.
				builder().
				userId(BaseContext.getCurrentId()).
				build());
	}

	/**
	 * 清空购物车商品
	 */
	public void cleanShoppingCart() {
		shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
	}
}
